48V to 12V Buck converter with 3KW Support

I would like to know solutions available for 48 to 12V buck converters with 3kW Power support .

The flyer below mentions it can support up to 12 Phases .  I would like to know more details about the Output Current supported by the controller in Polyphase Designs .

https://www.analog.com/media/en/news-marketing-collateral/solutions-bulletins-brochures/DC-DC-Controller-Selection-Guide.pdf

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    •  Analog Employees 
    on Jan 16, 2020 4:15 PM over 1 year ago

    Either the LTC3892 or the LTC7810 would work for this.   You will need an external clock to stagger the phases.   The 3892 will only go to 60Vin.  The 7810 will do up to 150V.   There is a two phase 48-12V app at 900W on page 38 of the 7810 data sheet, but it is limited to 60V.  That app would get you to 3kW with 8 Phases with some margin if you only needed 60V.   80V or 100V Fets might get you a bit less power per phase depending on the switching frequency.   Either way, you will need to run it at a relatively low switching frequency and the inductors will be big.

  • Thank you Seth for the response.

    I am referring to LTC3871 , missed mentioning it in my post .  I would like to know about 12 Phase supported by LTC3871 .   I am planning to use LTC3871 in buck mode for 48V to 12V conversion .  I need to support 200A current on 12V rail .    Input Voltage Can be limited to 60V in my application . 

    I'll Look into the suggested solutions of LTC3892 & LTC7810 . 

    LTC3871 flyer :

     . 

Reply
  • Thank you Seth for the response.

    I am referring to LTC3871 , missed mentioning it in my post .  I would like to know about 12 Phase supported by LTC3871 .   I am planning to use LTC3871 in buck mode for 48V to 12V conversion .  I need to support 200A current on 12V rail .    Input Voltage Can be limited to 60V in my application . 

    I'll Look into the suggested solutions of LTC3892 & LTC7810 . 

    LTC3871 flyer :

     . 

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